5.
RLatSM Phase 1 commences no earlier than Westbound Tracks on
the 12TH NOVEMBER 2015
RLatSM takes place in the NAT Region Datalink Mandate Airspace
(FL350-390)
There is no need to opt into the trial. Clearances will be issued
according to eligibility from the flight plan.
RNP4 approvals are required to participate in the trial.
OTS Track Message NOTE 3 secured to indicate RLatSM Tracks
(Similar to Note 2 utilised for DLM.)
Tactical re-route onto half degree tracks prior to entry are not
permitted. (unless there is a CPDLC OCL capability.)
Enhanced conformance monitoring tools utilising ADS-C demand
reports prior to entry and CPDLC post entry are being utilised.
There is no change to in-flight contingency procedures.
There is no change to SLOP procedures.
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9.
GANDER GOTA 5LNCS
There a number of new fixes that are planned for the September AIRAC which are
known as GOTA Phase 2 fixes, i.e. ones that are 30nm separated from the new
fixes that went in as part of the GOTA Phase 1 introduction last September.
15th October published.
12th November 2015 available for use.
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10.
BACKGROUND
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11.
What is the RLAT Separation Trial?
It is a trial of a reduced lateral separation (25nm) to prove it
brings benefit and is safe to use, so that it can become a global
separation standard.
Practical Application of 25nm (half degree) trial will be carried out
in 3 phases as set out in the Implementation Plan which can be
found on the ICAO Paris Website:
1 One RLAT OTS track between 2 core tracks (12th Nov)
2 All OTS (approximately 1 year)
3 All area (TBC)
Trial is being carried out in 3 phases:
Each phase is vertically coincident with the DLM at that time (FL350-FL390)
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12.
Gander and Shanwick participating in Phase 1 and Phase 2 of the
trial.
Which ANSPs are participating in
Phase 1 and 2 of the RLAT Trial?
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20.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
PHASE -1 & 2
All flights can be cleared to cross RLAT
tracks at RLAT levels but only touch an
RLAT track at one point.
No flights will be cleared to join RLAT
tracks at RLAT levels that touch an RLAT
track at more than one point.
Equipped flights (FANS + RNP4) can be
cleared on RLAT tracks at RLAT levels
CLEARANCE TO FLIGHTS
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21.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
PHASE -1 & 2
All flights can be cleared to cross RLAT
tracks at RLAT levels but only touch an
RLAT track at one point.
No flights will be cleared to join RLAT
tracks at RLAT levels that touch an RLAT
track at more than one point.
Equipped flights (FANS + RNP4) can be
cleared on RLAT tracks at RLAT levels
CLEARANCE TO FLIGHTS
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22.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
PHASE -1 & 2
All flights can be cleared to cross RLAT
tracks at RLAT levels but only touch an
RLAT track at one point.
No flights will be cleared to join RLAT
tracks at RLAT levels that touch an RLAT
track at more than one point.
Equipped flights (FANS + RNP4) can be
cleared on RLAT tracks at RLAT levels
CLEARANCE TO FLIGHTS
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23.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
PHASE -1 & 2
All flights can be cleared to cross RLAT
tracks at RLAT levels but only touch an
RLAT track at one point.
No flights will be cleared to join RLAT
tracks at RLAT levels that touch an RLAT
track at more than one point.
Equipped flights (FANS + RNP4) can be
cleared on RLAT tracks at RLAT levels
CLEARANCE TO FLIGHTS
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24.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
PHASE -1 & 2
All flights can be cleared to cross RLAT
tracks at RLAT levels but only touch an
RLAT track at one point.
No flights will be cleared to join RLAT
tracks at RLAT levels that touch an RLAT
track at more than one point.
Equipped flights (FANS + RNP4) can be
cleared on RLAT tracks at RLAT levels
CLEARANCE TO FLIGHTS
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25.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
PHASE -1 & 2
All flights can be cleared to cross RLAT
tracks at RLAT levels but only touch an
RLAT track at one point.
No flights will be cleared to join RLAT
tracks at RLAT levels that touch an RLAT
track at more than one point.
Flights that don’t meet criteria (i.e. not
RNP4) cannot be cleared on RLAT track at
RLAT levels.
Equipped flights (FANS + RNP4) can be
cleared on RLAT tracks at RLAT levels
CLEARANCE TO FLIGHTS
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26.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
PHASE -1 & 2
All flights can be cleared to cross RLAT
tracks at RLAT levels but only touch an
RLAT track at one point.
No flights will be cleared to join RLAT
tracks at RLAT levels that touch an RLAT
track at more than one point.
Only flights that have planned on half
degree RLAT track will be cleared on that
track, no flights will be rerouted onto a
half degree track prior to entry.
Equipped flights (FANS + RNP4) can be
cleared on RLAT tracks at RLAT levels
CLEARANCE TO FLIGHTS
Flights that don’t meet criteria (i.e. not
RNP4) cannot be cleared on RLAT track at
RLAT levels.
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29.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
Clearances are initially based on flight plan designators as
no FANS connections are in place at the time of issue.
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32.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
Equipped flights which do not meet connection criteria
prior to entry could be cleared on RLat tracks at RLat levels
if RLat separations are not being applied and insufficient
notice is given that flight cannot establish connections.
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33.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
Equipped flights which do not meet connection criteria
prior to entry will not be cleared on to RLat tracks at RLat
levels if there is sufficient notice given that the flight cannot
establish the connections.
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41.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
EGGX establishes connection and ADS-C contracts /
CPDLC connection requests sent to avionics
EGGX system will attempt to establish
contracts twice and if fails warning will be
output no later than 12 minutes from the
boundary which may result in revised
clearance.
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43.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
EGGX sends up ADS-C DEMAND to
avionics to establish that NEXT = ERAKA
and NEXT+1 = 58N
If out of conformance then EGGX will
request domestic controller to confirm
next position after entry.
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45.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
Domestic agency send END SERVICE to avionics to
ensure EGGX becomes the active centre (CDA)
If END SERVICE fails, domestic will
contact EGGX and flight may be
requested to perform re-logon to EGGX.
If unsuccessful, then revised OAC level
may be issued.
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47.
BALIX
GOMUP
ERAKA
Boundary Points
ETILO
ADODO
Shanwick Scottish
A
B
C
EGGX sends up ‘WELCOME MESSAGE’ to establish
Current Data Authority
If this fails, ATC will initially contact
previous ANSP and have END SERVICE
sent manually, or will instruct crew to
perform a re-logon to EGGX to recycle the
system.
If unsuccessful, then revised OAC level
may be issued.
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51.
Prior to entry GAATS+ will send ADS-C DEMAND requests until
such time the boundary and the next position have been confirmed
as being correct, otherwise planner will see non conformance
warnings prior to entry.
Once flight has entered the OAC, CPDLC will be utilised (initially
tactically) such that the pilot will be requested to send down the
full loaded route in the FMC, which GAATS+ will conformance
monitor from entry to exit. Once again only if non conformance
would the controller be informed.
Crew action is to respond by selecting the appropriate button that
sends the FMS routing….not to freetext the whole route as has
been seen during operational tests.
EHANCED CONFORMANCE MONITORING
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52.
FREQUENTLY
ASKED
QUESTIONS
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53.
FAQ’s FOR RLAT (Timeline)
Airspace
OTS
Flight
Planning
Datalink
Logon
CPDLC
ADS-C
UM137
Oceanic
Clearance
Re-
Clearance
Enroute
Phase
Loss of
Criteria
NAT
Contingency
Procedures
Datalink
Handover
When are the airspace changes that support Rlat coming into force ?
On the 17th of September two new points south of BALIX on the
10W interface will become active.
On the 12th of November two new points north of BALIX on the
10W interface, new Gander Oceanic Transition Area (GOTA) points,
and two new points on the BREST interface will become active.
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54.
FAQ’s FOR RLAT (Timeline)
Airspace
OTS
Flight
Planning
Datalink
Logon
CPDLC
ADS-C
UM137
Oceanic
Clearance
Re-
Clearance
Enroute
Phase
Loss of
Criteria
NAT
Contingency
Procedures
Datalink
Handover
How will the tracks be designed and indicated to operators ?
The ANSP responsible for designing the tracks will identify the core
tracks, (the tracks with the highest loading) from the Priority Route
Message data, and subject to their location and other tactical
considerations, will designate these tracks as the Rlat tracks.
The Rlat tracks will be identified in Note 3 of the OTS Track Message.
RLat will be at published OTS levels, but will only be between FL350-
FL390, noting that levels can be left off the Rlat tracks in line with all
other OTS tracks.
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57.
FAQ’s FOR RLAT (Timeline)
Airspace
OTS
Flight
Planning
Datalink
Logon
CPDLC
ADS-C
UM137
Oceanic
Clearance
Re-
Clearance
Enroute
Phase
Loss of
Criteria
NAT
Contingency
Procedures
Datalink
Handover
What will happen if the logon is not performed or cannot be achieved?
Should the crew fail to peform a logon in good time, the controller
will be alerted to the fact that the aircraft no longer meets the
criteria to be eligible to be cleared on the Rlat track, and subject to
the traffic situation at that time, will be likely to receive a revised non
Rlat clearance.
If the logon fails during the handover process, the transferring
agency will contact the flight and instruct the crew to perform a
manual logon to avoid a re-clearance being issued.
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58.
FAQ’s FOR RLAT (Timeline)
Airspace
OTS
Flight
Planning
Datalink
Logon
CPDLC
ADS-C
UM137
Oceanic
Clearance
Re-
Clearance
Enroute
Phase
Loss of
Criteria
NAT
Contingency
Procedures
Datalink
Handover
Why do you need connections in place prior to entering the NAT?
ADS-C provides our procedural controllers with a regular update of
where the flight is (14minute reports) as well as instant reports
should the flight deviate from clearance.
CPDLC provides a fast communication capability to the controller that
assures a level of intervention capability.
It is this Comms and Surveillance capability that permits reductions
in standard separations in remote areas such as the North Atlantic.
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59.
FAQ’s FOR RLAT (Timeline)
Airspace
OTS
Flight
Planning
Datalink
Logon
CPDLC
ADS-C
UM137
Oceanic
Clearance
Re-
Clearance
Enroute
Phase
Loss of
Criteria
NAT
Contingency
Procedures
Datalink
Handover
Why and when will be you be sending UM137 (Confirm Assigned Route)?
In addition to utilising pre boundary ADS-C Demand reports, UM137
gives the controller assurance that the full oceanic route loaded into
the active flight plan of the Flight Management System is in
conformance.
Shanwick will initially use UM137 tactically so as to monitor
responses from crews, and to manage associated workload. When
this assurance is gained, the adaptation will be set such that UM137
will be sent automatically 5 minutes after entry.
Crews action is to send DM40 through enabled menu button.
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60.
FAQ’s FOR RLAT (Timeline)
Airspace
OTS
Flight
Planning
Datalink
Logon
CPDLC
ADS-C
UM137
Oceanic
Clearance
Re-
Clearance
Enroute
Phase
Loss of
Criteria
NAT
Contingency
Procedures
Datalink
Handover
How is Shanwick issuing Rlat Oceanic Clearances when flight has not yet
established datalink communications?
Our system will initially use the Flight Plan information to base a
clearance, as it does for MNPS and RVSM.
At pre-determined times our system will then look for the associated
logons and establishment of CPDLC connections and ADS-C contracts
prior to entry.
Should any of those not be established the flight will no longer meet
the criteria, and will be subject to a re-clearance.
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61.
FAQ’s FOR RLAT (Timeline)
Airspace
OTS
Flight
Planning
Datalink
Logon
CPDLC
ADS-C
UM137
Oceanic
Clearance
Re-
Clearance
Enroute
Phase
Loss of
Criteria
NAT
Contingency
Procedures
Datalink
Handover
What is likely to happen should a flight be subject to a re-clearance?
Should a Shanwick planning controller be made aware that a flight no
longer meets the criteria for the Rlat clearance, then subject to traffic
and separations a new clearance outside the Rlat track area will be
considered.
ATC Procedures are being finalised such that the Oceanic controller
will call domestic who will then liaise with the crew accordingly.
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62.
FAQ’s FOR RLAT (Timeline)
Airspace
OTS
Flight
Planning
Datalink
Logon
CPDLC
ADS-C
UM137
Oceanic
Clearance
Re-
Clearance
Enroute
Phase
Loss of
Criteria
NAT
Contingency
Procedures
Datalink
Handover
What is likely to happen should a flight be subject to a re-clearance?
It is important that a swift ATC decision is reached and implemented
to avoid unnecessary workload, and therefore it is important for
crews to respond quickly.
Ensuring that the appropriate request for oceanic clearance in
relation to the datalink capability is made, is important to avoid late
changes to Oceanic Clearance, which will result in higher workload
both to ATC and the crew.
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63.
FAQ’s FOR RLAT (Timeline)
Airspace
OTS
Flight
Planning
Datalink
Logon
CPDLC
ADS-C
UM137
Oceanic
Clearance
Re-
Clearance
Enroute
Phase
Loss of
Criteria
NAT
Contingency
Procedures
Datalink
Handover
Is there any difference to operations when the flight has entered the NAT?
Should a flight lose criteria (manually logs off by selecting ATC COMM
OFF) then our system will output associated warnings.
The oceanic controller will then attempt to have the connections re-
established prior to initiating an enroute re-clearance.
Shanwick will be utilising UM79 (re-route) clearance message as part
of the system update, noting that crews will continue to be required
to reconnect to flight plan should a reroute result in a discontinuity at
the oceanic exit point.
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64.
FAQ’s FOR RLAT (Timeline)
Airspace
OTS
Flight
Planning
Datalink
Logon
CPDLC
ADS-C
UM137
Oceanic
Clearance
Re-
Clearance
Enroute
Phase
Loss of
Criteria
NAT
Contingency
Procedures
Datalink
Handover
What is likely to happen should a flight be subject to a re-clearance?
It is important that ADS-C provides the improved surveillance
capability, and CPDLC provides swift communications. Therefore
should either of these components be lost, then the controller is
required to re-establish them or revert to standard separations by
issuing re-clearances.
Correct flight planning and use of datalink functionality will mitigate
against re-clearances.
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65.
FAQ’s FOR RLAT (Timeline)
Airspace
OTS
Flight
Planning
Datalink
Logon
CPDLC
ADS-C
UM137
Oceanic
Clearance
Re-
Clearance
Enroute
Phase
Loss of
Criteria
NAT
Contingency
Procedures
Datalink
Handover
What is likely to happen should a flight be subject to a re-clearance?
As part of the success criteria for Phase 1 of the trial, Shanwick will
be monitoring datalink performance both in terms of system but also
user actions, so that improvements can be put in place to mitigate
poor performance.
As part of that, operators will be contacted should investigations
indicate incorrect flight planning or operation.
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67.
FAQ’s FOR RLAT (Timeline)
Airspace
OTS
Flight
Planning
Datalink
Logon
CPDLC
ADS-C
UM137
Oceanic
Clearance
Re-
Clearance
Enroute
Phase
Loss of
Criteria
NAT
Contingency
Procedures
Datalink
Handover
What should crew do if there is a datalink handover failure at the boundary?
As stated in the GOLD (Global Datalink Document) the datalink
handover process should be seamless to the crew.
If the handover fails, then ATC will instruct the crew accordingly.
Normal response is for crew to be instructed to select ATC Comm Off
and logon to next agency.
It is important that this is done, otherwise the receiving ANSP will not
indicate the appropriate criteria and as stated before may consider a
re-clearance.
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68.
OPERATIONAL
INFORMATION
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69.
How are operators being informed?
UK RLATSM AIC being
published on the 1st
October which updates
current AIC 062/2015
and includes text
relating to SLOP and
Contingency Procedures
065/2015
Note that same text as
NAVCANDA AIC
published in June
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70.
How are operators being informed?
Special Emphasis
Items Ops Bulletin
003/2015
Can be found on the
ICAO Paris Website.
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71.
How are operators being informed?
UK ARINC424
Identifiers AIC for
half-degree waypoints
in the Shanwick
Oceanic Control Area.
059/2015
Note that same text as
NAVCANDA AIC
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72.
How are operators being informed?
Web based video
covering practical
aspect of RLAT due for
publication in August
and hosted on
NATS.Areo
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77.
• RLAT Phase 1 and 10 minute crossing separation commences on
the 12th of November (EGGX & CZQX)
• Need RNP4 to be eligible to fly on RLAT tracks and be separated
by 25nm
• Note 3 of OTS Track Message will identify RLAT Tracks
• New fixes on the various boundaries start to appear in
September
• Crews to respond to ‘confirm assigned route’ upon entry by
selecting appropriate key rather than manually respond.
• Correct datalink operations important to minimise impact to ATC
and crews.
• No change to SLOP procedures.
• No change to in flight contingency and weather deviation
procedures.
24.8.15
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